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公开(公告)号：EP0050024B1
公开(公告)日：1986-01-29
申请号：EP81304712.3
申请日：1981-10-09
发明人： Honjo, Masahiro , Tomita, Masao
IPC分类号： G11B5/588
CPC分类号： G11B5/588
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2.发明公开Magnetic recording and reproducing method and apparatus for carrying out such a method 失效一种用于磁记录和重放装置和方法，用于实现该方法。
公开(公告)号：EP0143654A2
公开(公告)日：1985-06-05
申请号：EP84308256.1
申请日：1984-11-28
发明人： Tomita, Masao
CPC分类号： G11B5/0086 , G11B5/02 , H04N5/78213 , H04N9/802
摘要： A magnetic recording and reproducing method, applicable to a magnetic recording and reproducing apparatus such as a video tape recorder, comprises the steps of recording a first signal in a magnetic layer (6b) of a magnetic tape by a first head, recording a second signal which is preferably a digital signal in a shallower portion (6a) of the first signal recorded magnetic layer by a second head having a different azimuth from that of the first head. The width of the shallower portion (6a) is preferably narrower than the width of the first signal recorded magnetic layer. The recorded first and second signals are reproduced by heads having different azimuth from each other, respectively, so as not to interfere with each other.
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公开(公告)号：EP0041868B1
公开(公告)日：1985-02-27
申请号：EP81302558.2
申请日：1981-06-09
发明人： Honjo, Masahiro , Tomita, Masao
IPC分类号： H04N5/783
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公开(公告)号：EP0089197A1
公开(公告)日：1983-09-21
申请号：EP83301356.8
申请日：1983-03-11
发明人： Tomita, Masao , Takeuchi, Akihiro , Tomita,Akio,
摘要： Video disc reproducing apparatus comprises a pickup (5) having a stylus (5a) in capacative contact with the surface of a video disc (1). The pressure of the stylus (5a) in the disc (1) is adjusted in proportion to a logarithm of the reproduced signal amplitude by a control circuit (15) including a logarithmic converter (11), a rectifier (12) and a low pass filter (13). In a further embodiment the output from an automatic gain control circuit which is used to maintain the output signal constant is used to control the pressure of the stylus.
摘要翻译： 视频盘再现装置包括具有与视盘（1）的表面电容接触的触笔（5a）的拾取器（5）。 通过包括对数转换器（11），整流器（12）和低通的控制电路（15），将盘（1）中的触笔（5a）的压力与再生信号振幅的对数成比例地调整 过滤器（13）。 在另一实施例中，用于维持输出信号恒定的自动增益控制电路的输出用于控制触针的压力。
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5.发明公开
公开(公告)号：EP0495480A2
公开(公告)日：1992-07-22
申请号：EP92100601.1
申请日：1992-01-15
发明人： Tomita, Masao
CPC分类号： G11B5/00873 , G11B5/00878 , G11B15/125 , G11B15/4677 , H04N5/7826 , H04N5/78263 , H04N5/92 , H04N5/9205 , H04N9/802
摘要： 5 n7 A video tape recorder in which video and audio signals of a plurality of channels are simultaneously recorded onto the same tape by using the same tape running mechanism and the signals of a plurality of channels are simultaneously reproduced from the tape is disclosed. The video tape recorder of the invention comprises a recording system and a playback system. The recording system includes recording processing means (2, 8) for converting the plurality of video signals into recordable signals, respectively, first and second rotary head pairs (3, 4; 9, 10) which are oppositely arranged to a cylinder and each head has a track width narrower than a recording track pitch and which have gap azimuth angles in an opposite relation, and records the signals onto the tape and reads out the signals from the tape, and means (16, 18) for recording a control signal synchronous with a vertical sync signal included in one video signal onto a control track. The playback system includes a playback processing means (12, 49) for reconstructing reproduced signals from the rotary head pairs into video signals and servo means (19, 20) for reproducing the control signal to control the rotary head pair and the tape run.
摘要翻译： 公开了一种通过使用相同的磁带运行机构同时将多个通道的视频和音频信号同时记录到同一磁带上并且从磁带同时再现多个信道的信号的录像机。 本发明的录像机包括记录系统和播放系统。 记录系统包括用于将多个视频信号分别转换成可记录信号的记录处理装置（2,8），分别与气缸相对地布置的第一和第二旋转磁头对（3,4; 9,10） 具有比记录轨道间距窄的轨道宽度，并且具有相反关系的间隙方位角，并将该信号记录到磁带上并从磁带读出信号，以及用于记录控制信号同步的装置（16,18） 将一个视频信号中包含的垂直同步信号传送到控制轨道上。 重放系统包括用于将来自旋转磁头对的再现信号重构为视频信号的重放处理装置（12,49）和用于再现控制信号以控制旋转磁头对和磁带运行的伺服装置（19,20）。
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6.发明公开
公开(公告)号：EP0375365A2
公开(公告)日：1990-06-27
申请号：EP89313290.2
申请日：1989-12-19
发明人： Tomita, Masao , Otsuki, Takuya , Nagasaki, Sakon
IPC分类号： H04N9/79
CPC分类号： H04N9/79 , H04N9/7925
摘要： A video tape recorder (VTR) incorporates a converter (5) for converting television standards and effectively changes the manner of connecting it with a servo system (9) and video signal processing system (6, 11, 28). The VTR can play back the tape recorded in different television standards from those adopted in one's own country and record video signals in different television standards from those adopted in one's own country.
摘要翻译： 一种录像机（VTR）包括用于转换电视标准的转换器（5），并有效地改变与伺服系统（9）和视频信号处理系统（6,11,28）连接的方式。 录像带可以播放与本国采用的不同电视标准录制的录像带，并录制与本国采用的电视标准不同的视频信号。
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7.发明授权Magnetic recording and reproducing method and apparatus for carrying out such a method 失效用于实现这种方法的磁记录和再现方法和装置
公开(公告)号：EP0143654B1
公开(公告)日：1990-04-25
申请号：EP84308256.1
申请日：1984-11-28
发明人： Tomita, Masao
CPC分类号： G11B5/0086 , G11B5/02 , H04N5/78213 , H04N9/802
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公开(公告)号：EP0178868A2
公开(公告)日：1986-04-23
申请号：EP85307312.0
申请日：1985-10-11
CPC分类号： H04N9/79 , H04N9/7921 , H04N9/831
摘要： A chrominance signal processing apparatus used for such as the color television signal recording and reproducing apparatus (VTR) to record and reproduce a color television signal, comprises means (2,3,26,17,24) for converting a carrier chrominance signal (fsc) to a low-band signal (fc) for recording, and, for reproduction, means (27,16,13) for reconverting the converted low-band signal (fc) to the carrier chrominance signal (fsc) of the original color subcarrier frequency, to thereby record and reproduce the chrominance signal. Means (40, 41, 42, 43) for detecting the burst in the carrier chrominance signal (fsc) necessary for the level adjustment of the chrominance signal or for the control of the conversion frequency or for discrimination of black and white signal under a state of the low-band converted chrominance signal during recording and reproduction, the level detection, phase detection, and synchronous detection in low frequency are made possible. Further, the level detection, phase detection, and synchronous detection are carried out after once demodulating the low-band converted chrominance signal into two color difference signals in the base band to thereby use a part of circuit in common and improve performance. Furthermore, by performing digital sampling demodulation for demodulating the low-band inverted burst into the base band by means of an AID converter and digital circuits, integration of digital LSis, combined used of detection circuits, detection circuits and a part of frequency conversion circuits, realization of any non-linear characteristics and reduction of external parts such as analog filters become possible of the chrominance signal processing apparatus. Accordingly, a small and inexpensive chrominance signal processing apparatus of low consumption power is realized.
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公开(公告)号：EP0038190A2
公开(公告)日：1981-10-21
申请号：EP81301581.5
申请日：1981-04-10
发明人： Honjo, Masahiro , Tomita, Masao
IPC分类号： H04N5/783
摘要： In a rotary head magnetic recording and reproducing system, the number of horizontal synchronising signals between the vertical synchronising signals is kept almost constant by delaying the video signal of the field following the one in which a shift of track is detected due to the speed of the magnetic tape in the reproducing mode being different from the speed of the magnetic tape in the recording mode. The speed of the tape in a video tape recorder (1) is detected by a velocity detector (2) and the correction corresponding to that speed having regard to the recording speed is chosen by a control circuit (4). The field where correction is to start is determined by a track shift detector (3) which triggers the control circuit to activate a delay circuit (5).
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公开(公告)号：EP0495480B1
公开(公告)日：1996-10-02
申请号：EP92100601.1
申请日：1992-01-15
发明人： Tomita, Masao
CPC分类号： G11B5/00873 , G11B5/00878 , G11B15/125 , G11B15/4677 , H04N5/7826 , H04N5/78263 , H04N5/92 , H04N5/9205 , H04N9/802
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